1. Non-radical activation of persulfate with Bi2O3/BiO1.3I0.4 for efficient degradation of propranolol under visible light.
- Author
-
Deng, Yuehua, Che, Qianqian, Li, Yani, Luo, Jiating, Gao, Xiang, He, Yan, Liu, Yiling, Liu, Tong, Zhao, Xiaolong, Hu, Xiaobin, and Zhao, Wei
- Abstract
• The Bi 2 O 3 /BiO 1.3 I 0.4 /persulfate system could effectively degrade propranolol. • The system maintained high degradation ability under neutral and alkaline conditions. • NO 3 − had almost no effect on the degradation of propranolol. • 1O 2 and h+ played important role in propranolol degradation. Non-radical activation of persulfate (PS) by photocatalysts is an effective approach for removing organic pollutants from aqueous environments. In this study, a novel Bi 2 O 3 /BiO 1.3 I 0.4 heterojunction was synthesized using a facile solvothermal approach and used for the first time for non-radical activation of PS to degrade propranolol (PRO) in the presence of visible light. The findings found that the degradation rate of PRO in the Bi 2 O 3 /BiO 1.3 I 0.4 /PS system was significantly increased from 19% to more than 90% within 90 min compared to the Bi 2 O 3 /BiO 1.3 I 0.4 system. This indicated that the composite system exerted an excellent synergistic effect between the photocatalyst and the persulfate-based oxygenation. Quenching tests and electron paramagnetic resonance demonstrated that the non-radical pathway with singlet oxygen as the active species played a major role in the photocatalytic process. The existence of photo-generated holes during the reaction could also be directly involved in the oxidation of pollutants. Meanwhile, a possible PRO degradation pathway was also proposed. Furthermore, the impacts of pH, humic acid and common anions on the PRO degradation by the Bi 2 O 3 /BiO 1.3 I 0.4 /PS were explored, and the system's stability and reusability were also studied. This study exhibits a highly productive catalyst for PS activation via a non-radical pathway and provides a new idea for the degradation of PRO. [Display omitted] [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF